4090831 has 4 divisors (see below), whose sum is σ = 4201432. Its totient is φ = 3980232.

The previous prime is 4090813. The next prime is 4090837. The reversal of 4090831 is 1380904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4090831 - 2⁵ = 4090799 is a prime.

It is a super-2 number, since 2×4090831² = 33469796541122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 4090796 and 4090805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55245 + ... + 55318.

It is an arithmetic number, because the mean of its divisors is an integer number (1050358).

Almost surely, 2^4090831 is an apocalyptic number.

4090831 is a deficient number, since it is larger than the sum of its proper divisors (110601).

4090831 is a wasteful number, since it uses less digits than its factorization.

4090831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110600.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 4090831 is about 2022.5802827082. The cubic root of 4090831 is about 159.9326669806.

The spelling of 4090831 in words is "four million, ninety thousand, eight hundred thirty-one".